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The Single UNIX &reg; Specification, Version 2<br>
Copyright &copy; 1997 The Open Group

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<h4><a name = "tag_001_014_985">&nbsp;</a>NAME</h4><blockquote>
ipcrm - remove a message queue, semaphore set or shared
memory segment identifier
</blockquote><h4><a name = "tag_001_014_986">&nbsp;</a>SYNOPSIS</h4><blockquote>
<pre><code>

ipcrm <b>[</b> -q msgid | -Q msgkey | -s semid | -S semkey |
    -m shmid | -M shmkey <b>]</b> ...
</code>
</pre>
</blockquote><h4><a name = "tag_001_014_987">&nbsp;</a>DESCRIPTION</h4><blockquote>
The
<i>ipcrm</i>
utility removes zero or more message queues, semaphore
sets or shared memory segments. The interprocess communication
facilities to be removed are specified by the options.
<p>
Only a user with appropriate privilege is allowed to remove an
interprocess communication facility that was not created by or
owned by the user invoking
<i>ipcrm</i>.
</blockquote><h4><a name = "tag_001_014_988">&nbsp;</a>OPTIONS</h4><blockquote>
The
<i>ipcrm</i>
facility supports the <b>XBD</b> specification, <a href="../xbd/utilconv.html#usg"><b>Utility Syntax Guidelines</b>&nbsp;</a> .
<p>
The following options are supported:
<dl compact>

<dt><b>-q&nbsp;</b><i>msgid</i>
<dd>
Remove the message queue identifier
<i>msgid</i>
from the system and destroy the message queue and
data structure associated with it.

<dt><b>-m&nbsp;</b><i>shmid</i>
<dd>
Remove the shared memory identifier
<i>shmid</i>
from the system.
The shared memory segment and data
structure associated with it are destroyed after
the last detach.

<dt><b>-s&nbsp;</b><i>semid</i>
<dd>
Remove the semaphore identifier
<i>semid</i>
from the system and destroy the set of semaphores and
data structure associated with it.

<dt><b>-Q&nbsp;</b><i>msgkey</i>
<dd>
Remove the message queue identifier, created
with key
<i>msgkey</i>,
from the system and destroy the
message queue and data structure associated with it.

<dt><b>-M&nbsp;</b><i>shmkey</i>
<dd>
Remove the shared memory identifier, created
with key
<i>shmkey</i>,
from the system.
The shared memory segment and data structure associated
with it are destroyed after the last detach.

<dt><b>-S&nbsp;</b><i>semkey</i>
<dd>
Remove the semaphore identifier, created with key
<i>semkey</i>,
from the system and destroy the set
of semaphores and data structure associated with it.

</dl>
</blockquote><h4><a name = "tag_001_014_989">&nbsp;</a>OPERANDS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_990">&nbsp;</a>STDIN</h4><blockquote>
Not used.
</blockquote><h4><a name = "tag_001_014_991">&nbsp;</a>INPUT FILES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_992">&nbsp;</a>ENVIRONMENT VARIABLES</h4><blockquote>
The following environment variables affect the execution of
<i>ipcrm</i>:
<dl compact>

<dt><i>LANG</i><dd>Provide a default value for the internationalization
variables that are unset or null.
If
<i>LANG</i>
is unset or null, the corresponding value from the
implementation-dependent default locale will be used.
If any of the internationalization variables contain an invalid
setting, the utility will behave as if none of the variables had been set.

<dt><i>LC_ALL</i><dd>If set to a non-empty string value, override the values
of all the other internationalization variables.

<dt><i>LC_CTYPE</i><dd>
Determine the locale for the interpretation of
sequences of bytes of text data as characters (for
example, single- as opposed to multi-byte characters in
arguments).

<dt><i>LC_MESSAGES</i><dd>
Determine the locale that should be used to affect the
format and contents of diagnostic messages written to
standard error.

<dt><i>NLSPATH</i><dd>
Determine the location of message catalogues for the
processing of
<i>LC_MESSAGES .
</i>
</dl>
</blockquote><h4><a name = "tag_001_014_993">&nbsp;</a>ASYNCHRONOUS EVENTS</h4><blockquote>
Default.
</blockquote><h4><a name = "tag_001_014_994">&nbsp;</a>STDOUT</h4><blockquote>
Not used.
</blockquote><h4><a name = "tag_001_014_995">&nbsp;</a>STDERR</h4><blockquote>
Used only for diagnostic messages.
</blockquote><h4><a name = "tag_001_014_996">&nbsp;</a>OUTPUT FILES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_997">&nbsp;</a>EXTENDED DESCRIPTION</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_998">&nbsp;</a>EXIT STATUS</h4><blockquote>
The following exit values are returned:
<dl compact>

<dt> 0<dd>Successful completion.

<dt>&gt;0<dd>An error occurred.

</dl>
</blockquote><h4><a name = "tag_001_014_999">&nbsp;</a>CONSEQUENCES OF ERRORS</h4><blockquote>
Default.
</blockquote><h4><a name = "tag_001_014_1000">&nbsp;</a>APPLICATION USAGE</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_1001">&nbsp;</a>EXAMPLES</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_1002">&nbsp;</a>FUTURE DIRECTIONS</h4><blockquote>
None.
</blockquote><h4><a name = "tag_001_014_1003">&nbsp;</a>SEE ALSO</h4><blockquote>
<i><a href="ipcs.html">ipcs</a></i>,
the <b>XSH</b> specification description of
<i><a href="../xsh/msgctl.html">msgctl()</a></i>,
<i><a href="../xsh/semctl.html">semctl()</a></i>,
<i><a href="../xsh/shmctl.html">shmctl()</a></i>.
</blockquote><hr size=2 noshade>
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UNIX &reg; is a registered Trademark of The Open Group.<br>
Copyright &copy; 1997 The Open Group
<br> [ <a href="../index.html">Main Index</a> | <a href="../xshix.html">XSH</a> | <a href="../xcuix.html">XCU</a> | <a href="../xbdix.html">XBD</a> | <a href="../cursesix.html">XCURSES</a> | <a href="../xnsix.html">XNS</a> ]

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